Biology, 08.12.2019 13:31 gymnastcaitlyn1

People with night blindness have difficulty seeing in dim light. the allele for night blindness, n, is dominant to the allele for normal vision, n. these alleles are not carried on the sex chromosomes.

* individual 12 is a boy. what is his phenotype?

* what is the genotype of individual 1 ? explain the evidence for your answer.

*what is the probability that the next child born to individuals 10 and 11 will be a girl with night blindness ? show your working.

note: answer as many you want and have a great day

People with night blindness have difficulty seeing in dim light. the allele for night blindness, n,

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Answer from: SithLeo

A is nn since he has normal vision.
If he had just one allele that was N he would be night blind.

b) night blindless

c) is 25% since the male is heterozygous, and the female is homozygous meaning that there is a 50% chance of having a nightblind child, this is reduced to 25% when you also have to get xx chromosomes.

Answer from: Quest

increase soil erosion reduce soil erosion

cattle grazing hydroseeding

deforestation contour plowing

planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

Answer from: Quest

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.

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People with night blindness have difficulty seeing in dim light. the allele for night blindness, n,...

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